George for Model Number thermador (bosch) ventilator vck1 Fan has worked intermittently. I can't get the cover off the roof-top housing for the 1000CFM fan/motor thanks to my roofers who used a lot of caulk. When I turn on the fan it will go full speed and will decrease speed initially after turning it on. Then it will just turn on full speed--but doesn't decrease speed as I turn the knob on the speed control. Then sometimes it doesn't start up. I leave it alone for a week and sometimes it starts and sometimes it doesn't. Fan motor? speed control? When I opened the unit to look the cover on the Molex receptacle was pretty dried out and loose. Is there a relay anywhere that might be involved? What does the Molex do?
Answer George, The molex receptacle is where the wires connect together. The cover would have no bearing on the unit operation. The most likely cause for the unit failure is the fan switch 00414188. Read More... Answered by AppliancePartsPros.com | Thursday, November 14, 2013